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Investigation of Thermal Quench Characteristic in the HTS Bi-2223 Racetrack Coil

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8 Author(s)
Jaedeuk Lee ; Korea Electrotechnol. Res. Inst., Changwon ; Ho Min Kim ; Seung Kyu Baik ; Eon-Yong Lee
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The thermal stability and quench propagations are one of the most fundamental issues for the High Temperature Superconducting (HTS) coil. Superconductivity is confined within the phase surface bounded by magnetic field, temperature, and current. Of these three parameters, the temperature is neither completely controllable, nor predictable, because the energy stored in the magnet, can easily be converted into heat up setting the thermal equilibrium within the winding. Therefore, in HTS coil operation, the temperature stability or more generally the thermal behavior of the conductor is the most important. In this paper, a HTS double racetrack pancake coil was prepared to examine the thermal stability, quench propagation and minimum quench energy (MQE). HTS coil was wound using the AMSC Bi-2223. The experimental results are discussed in this paper.

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IEEE Transactions on Applied Superconductivity  (Volume:18 ,  Issue: 2 )